IDNLearn.com provides a seamless experience for finding the answers you need. Our experts are ready to provide prompt and detailed answers to any questions you may have.

An index fossil, such as the Irish Elk, is :____________

a. the original set of fossil remains used to describe a species when it is first found.
b. a fossil with a strong stable isotope signature that can be used to calibrate the local vegetation cover.
c. the fossil remains of a species that existed during a well-established time period, to use in biostratigraphic dating.
d. the fossil of a species amenable to radiometric, and thus absolute, dating.